18. During meiosis, homologous chromosomes exchange genetic material. This exchange of
genetic material -
A. increases the genetic variation
B. reduces the diploid number to the haploid number
C. increases the haploid
number to the diploid number
D. reduces the probability of mutations
A. increases the genetic variation
that's why individuals don't look like their partents. This process is called crossing-over
During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material - A. increases the genetic variation.
During meiosis, homologous chromosomes may exchange genetic material during a process called "crossing over."
Crossing over takes place during the pachytene stage of Prophase I of Meiosis I where the non-sister chromatids of homologous chromosomes exchange genetic materialthis results in recombination of the genetic material and creates a new genetic combination. This results in variations, which can be beneficial to the offspring providing a better survival advantage.So, the correct answer is Crossing over produces new combinations of genes on alleles, increasing genetic variation.
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Explain how iron, in the diet of humans, is used in the body.
The human body needs iron to make the oxygen-carrying proteins hemoglobin and myoglobin. Hemoglobin is found in red blood cells. Myoglobin is found in muscles
What kind of energy is formed during photosynthesis? O A. Kinetic energy O B. Electrical energy O O O O O C. Chemical energy O D. Solar energy
Answer:
During photosynthesis, chemical energy is formed
What is the complementary strand to the following DNA below?
YOU WILL GET BRAINLIEST IF YOUR RIGHT
ATTCCGATAA
Answer:
The correct answer is - TAAGGCTATT
Explanation:
The DNA molecule is made up of two strands that make a double helix and each chain of nucleic acid sequence known as an individual strand that is composed of a complementary base bound with another strand bases.
Adenine is complementary to thymine similarly cytosine to guanine and vice versa so the complementary strand of the given would be as follows:
DNA strand- ATTCCGATAA
Complemntary strand - TAAGGCTATT
what is overpopulation and how does it effect us?
Answer:
The over loaded of peoples is called overpopulation. There will be more crowded and people will be unemployed and It can effect the global warming
Answer:
Overpopulation is is basically when there is too much of something on our planet or anything else.
When you have a tent that holds 5 people but you put 10 people in it, you would be "overpopulating" the tent. there's such thing as over-farming.
The of the cell directs cell activity and acts like the control center
Which tectonic plate boundary can only produce and earthquake?
A. Convergent
B. Divergent
C. Transform
D. Oceanic
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Answer:
B. Divergent
Explanation:
Along these boundaries, earthquakes are common and magma rises from the Earth's mantle to the surface, solidifying to create new oceanic crust :)
What is the source of bacteria which cause illness?
Question 2 options:
Rocks
Other bacteria
Soil
Miasma
Answer:
It is called Miasma I hope you get it right
Explanation:
Enjoy the correct answer
A student looks at his cell under a microscope which of the following observations would indicate the cell is from a plant rather than an animal
Answer:
Chloroplasts in the cytoplasm of the cell
Explanation:
The options you were given are the following:
nucleus is located inside of the cell numerous cilia on the outside of the cell chloroplasts in the cytoplasm of the cell a thin membrane around the edge of the cellThe organelles that would indicate that the observed cell belongs to a plant rather than an animal are chloroplasts. Chloroplasts are organelles that conduct photosynthesis - a process in which plants (and some other organisms that possess chloroplasts) get food. In this process, with the help of sunlight, plants transform carbon dioxide, water, and minerals into oxygen, which is released into the atmosphere, and glucose, which they feed on.
Both animal and plant cells have a cell membrane and the nucleus located inside of them.
The cilia are usually found in animal cells.
This is why the third option is the correct one.
Which is a reactant in the Calvin cycle?
A. Glucose
B. Oxygen
C. Carbon dioxide
D. Water
The reactant of the Calvin cycle is the carbon dioxide that is present in Option C, and the product of the Calvin cycle is glucose. The Calvin cycle takes place during the photosynthetic reaction.
What is the role of photosynthesis?Photosynthesis is a process in which the plant plays an important role, such as when the plant absorbs the sun's light, water, and carbon dioxide and then produces oxygen and glucose by combining all of these elements; thus, glucose and oxygen are the products, and water and carbon dioxide are the reactants. The water is used in the light-dependent reaction and converted into oxygen as a product, while in the case of the Calvin cycle or the light-independent reaction, carbon dioxide is used as the reactant and the product that is formed is glucose.
Hence, the reactant of the Calvin cycle is the carbon dioxide that is present in Option C.
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Explain what causes wind. Within your answer, be sure to include key terms: high and low air pressure, and temperature.
The products that plants produce in photosynthesis are different from the products that animals and some bacteria produce in cellular respiration. The products of photosynthesis are
Answer: Carbohydrates in the form of glucose and oxygen as byproduct.
Explanation:
Photosynthesis is a process which occurs in green plants and in other autotrophs. In this process the autotrophs can prepare their own food by using reactants like water and carbon dioxide to produce glucose which is a carbohydrate which a major source of energy for plants and oxygen gas is released as a byproduct of this chemical reaction. On the contrary to this the cellular respiration can be defined as the process in which the biochemical oxidation of food occurs and energy is released in the form of ATP and carbon dioxide and water are produced.
Thus in photosynthesis the carbon dioxide and water are the reactants whereas in cellular respiration they are the products.
How many bones we have
Answer: the adult human body has 206 bones in total
During which two months do both the Northern and Southern Hemispheres receive the same amount of energy from the Sun?
Answer:
in March and September
Explanation:
it is
Answer:
its c
Explanation:
they both get the same amount of sun
how had/has human activity influenced the tropic cascade of the aleutian islands kelp forest
Answer:
humans killing whales caused orcas to have to eat otters which caused sea urchin populations to increase which caused kelp populations to decrease
Explanation:
"Which areas or regions of the world, if any, are currently showing the greatest effects of climate change?"
Answer:
Climate change and land-use changes are expected to increase the rates of species extinction.
Explanation:
What are researchers doing to great whites in hopes of being able to learn more about their behavior patterns?
Answer:
tagging the sharks
Explanation:
To learn their behavioral patterns researchers are tagging the sharks. Doing so allows the researchers to track their movements individually and gather data as to how they move, where they migrate to, how many migrate together, etc. All this information is extremely valuable and when pieced together can shed light on why they have certain behavioral patterns or traits.
You have a piece of DNA containing the gene for green fluorescent protein (gfp) and the pBAD promoter. This DNA fragment has been cleaved with BamHI and HindIII and can be inserted into either the pKAN-R plasmid or the pARA plasmid. Which plasmid would you choose to use as the plasmid vector to express gfp protein in bacterial cells
Answer:
pARA plasmid
Explanation:
Plasmids are natural circular DNA samples found in bacteria cells. There are two types of plasmids founds in bacteria cells namely; pARA and pKAN-R.
The pKAN would not be maintained in the cell during replication but the pARA plasmid would and when the DNA fragment is inserted, the pARA would serve as a catalyst for the gfp protein.
Eutrophication occurs when excess nutrients are supplied to a region, leading to an algae bloom and ultimately
A) ocean deoxygenation
B) coral bleaching
c) ocean acidification
D) overfishing
Answer:
A) ocean deoxygenation
Explanation:
Eutrophication (eutrophication) begins when fertilizers (usually washed away by rain) reach the water from fields and other agroecosystems. Fertilizers are rich in phosphates and nitrates, which are otherwise a limiting factor for the flourishing of life in water.
With an excess of these salts, plants, especially algae, often begin to flourish. Then the number of dead algae increases, which are then decomposed by saprophytes, consuming oxygen. Thus, the concentration of oxygen in the water decreases, and thus there is suffocation and mass death of aquatic organisms that consume oxygen in the process of respiration.
The appearance of the pink color was due to the movement of a. phenolphthalein molecules from low concentration to high concentration b. base molecules from high concentration through the membrane to low concentration c. water molecules through the membrane from high concentration to low concentration d. phenolphthalein molecules in the water from high concentration to low concentration
Answer:
b. base molecules from high concentration through the membrane to low concentration
Note: the complete question is found in the attachment below
Explanation:
The process which enabled the color change in the water and phenology mixture is known as diffusion.
Diffusion is the movement of molecules from regions of higher concentration to regions of lower concentration until equilibrium concentration is attained.
In the setup by the student, the concentration of the base molecules are higher in container than in the test tube. The vaporized molecules of the base therefore, moved through the membrane into the water and phenolphthalein mixture, resulting in the color change to pink in the mixture due to the reaction of the base and the phenolphthalein.
acid rain is an example of ______.
chemical weathering.............
acrostic of planets
Answer:
You can combine the acronym and acrostic methods. The first four (inner) planets, in order from the Sun, are Mercury, Venus, Earth, and Mars. ... Now consider the acrostic: "My very easy mnemonic. Just spin us nine planets." You can memorize two sentences and use the first letter of each word to help you think of planets.
Answer:
To remember the planets, you can create an acrostic from the first letter of each planet, like "My Very Educated Mother Just Served Us Nachos"
Explanation:
Water clarity or turbidity, Measures the amount of sediment and debris In a body of water since light cannot sign into water with no clarity, turbidity Is a factor that is considered when monitoring water quality which of the following organisms would be most negatively affected by unclear water?
A. Geese nesting on the bank of the lake
B.trees growing along the lake shore
C.plants growing on the lake floor
D. Trout feeding near the lake surface
Answer:
b
Explanation:
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Which of the following describes photosynthesis?
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Thank youuuuuuuu.
Photosynthesis - the process that takes in matter from the sun and energy from carbon dioxide in the air and water from the soil to make glucose and oxygen.
This is the backbone of the DNA strand.
a. sugar-phosphate groups
b. nucleic acids
c. diploids
d. ribonucleic acids
e. amino acids
Answer: B. nucleic acids.
Explanation: A sugar-phosphate backbone (alternating grey-dark grey) joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.
1 point
36. You are conducting an experiment with a test tube of human cells in
solution. You add 3 tablespoons of sugar to the test tube. Predict what will
happen to the cells. *
The cells will gain water causing them to swell and burst.
The cells will lose water causing them to shrink and shrivel up.
The cells will not be affected.
The rate of active transport will increase.
Answer: 1.39
Explanation: 1.36 +3 = 1.39
Two objects of the same mass are in a room. At which of the following distances will the greatest gravitational force be exerted by one object on another?
2 m
4m
6 m
8m
Answer:
2m
Explanation:
The closer an object is the more gravitional force there is
Which of the following pairs of vertebrate groups are most like each other (share the most characteristics)? Circle your choice.
The correct answer is c.Amphibians and reptiles. An example of similarity between the two classes of vertebrates is the presence of a heart with three chambers
Which of the following is considered the first receiver for the nicotine in a smocking person?
1.left atrium
2.right atrium
3.left ventricle
4.right ventricle
Answer:
i think nicotine travels through blood and we know blood reaches the right ventricle first
maybe right ventricle